RE: [RESEND][PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-06-06 Thread Ran Wang
Hi Sergei, On Thursday, June 06, 2019 16:17 Sergei Shtylyov wrote: > > Hello! > > On 06.06.2019 5:54, Ran Wang wrote: > > > When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS > > (or its control signal) will turn on immediately on related Root Hub > > ports. Then the VBUS wil

Re: [RESEND][PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-06-06 Thread Sergei Shtylyov
Hello! On 06.06.2019 5:54, Ran Wang wrote: When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS (or its control signal) will turn on immediately on related Root Hub ports. Then the VBUS will be de-asserted for a little while during xhci reset (conducted by xhci driver) for a li

[RESEND][PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-06-05 Thread Ran Wang
When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS (or its control signal) will turn on immediately on related Root Hub ports. Then the VBUS will be de-asserted for a little while during xhci reset (conducted by xhci driver) for a little while and back to normal. This VBUS glitc

RE: [PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-02-26 Thread Ran Wang
Hi Rob, > -Original Message- > From: Rob Herring > Sent: Wednesday, February 27, 2019 00:40 > To: Ran Wang > Cc: Greg Kroah-Hartman ; Yang Li > ; linux-...@vger.kernel.org; devicet...@vger.kernel.org; > linux-kernel@vger.kernel.org; Ran Wang > Subject: Re: [PATC

Re: [PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-02-26 Thread Rob Herring
On Tue, 26 Feb 2019 06:59:21 +, Ran Wang wrote: > When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS > (or its control signal) will turn on immediately on related Root Hub > ports. Then the VBUS will be de-asserted for a little while during xhci > reset (conducted by xhci dri

[PATCH v3 1/2] usb: dwc3: Add avoiding vbus glitch happen during xhci reset

2019-02-25 Thread Ran Wang
When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS (or its control signal) will turn on immediately on related Root Hub ports. Then the VBUS will be de-asserted for a little while during xhci reset (conducted by xhci driver) for a little while and back to normal. This VBUS glitc